Device for sharpening the rotary circular knives of meat-slicing machines.



VEZ VAN BERKEL.

II fe Y GIRUU LAR ,KNIVES 0I' MEAT SUCING- MACHINES` P'fztented Mar. 23, i909.

2 SHEETS-SHEET l.

llVES 0F MEAT SLICING MACHINES.

DEVICE Pda SHABPB'NING THB ROTARY om Patented Mar. 23, 1909.

2 SHEETS-SHEET I?.

UNITED sTATEs PaTENT oFFIoE.

WILHELMUS ADRIANUS VAN BERKEL, OF RO'lTERDAhI, NETHERLANDS.

DEVICE FOR SHARPENING THE ROTARY CIRCULAR KNIVES F MEAT-SLICING i MACHINES.

Specification of Letters Patent.

Patented March 23, 1909.

Application Bled .Tune I9, 1907. Serial No. 879,716.

To all 'whom it may concern:

Be it known .that I, WiLmrLims Ancianos VAN BERKEL, residing at `54 Boezemsingel, Rotterdam, Netherlands in the Kingdom of the Netherlands, a subject of the-Queen ol" the Netherlands, have invented certain new and useful Improvements inlevices for Shar eni-ng the eta-ry Circulai- Knives oi l .eat Shcin Machines, of which the following is a 1o spec' cation. -2

Th's ,invention relates to devices for sharpening 'the rotarycircular knives ci meat slicing machines beings; development of the prior invention rial No. 271,513. l5 Under the present invention, instead of using only onesharpenin diskV and providing it with means where )y it ma be alpplled to either the inner or outer et gc of t e rotary circular knife, as in the said prior in- `.30 vcntion, I make the apparatus with two se arate sha. enlng devices one for each e ge of the knife thereby obviatinnr the necessity for changingr the position of the appara` tus according as it ma be desired to shar en the face or the b'ac of thc knife. llhe sharpenin disk for the 4 outer or hack edge of t e knife is preferably a rou 1h eme'ry or other stone and the Sharpener or the face or inner edge of` the knife maybe either a very ne stone, a steel `disk or a sharpening steel, preferablyV of somewhat oval form. I may say that the face` of the knife doesnot require to be sharpened so often as the back. The Sharpeners are each 36 fitted with elastic means such as' a s ring, Whereb they are held in contact Witlh the knife fe. The device or apparatus itself is slidab yriitted on a vertice pin on which it is raised out of engagement with the 40 knife e'd e by means of a spiral spring, being held Y w en in operation, by means of a catch arrangement as under my said prior invention. t l

In orderthet the invention Vmay be clearly understood I have Vhereunto appended er.-

planatory `drawin s, Whereonr- Fi l is a si e view of a sharpening device, aving two sharpening disks or wheels.

Fig. 2 is a plan View oi' the same. Fig. 3 is a plan view ol' the device having a sharpening disk for the outer edge of the knife and a, steel Shar incr l'or the inner edge ol the knife. Fig. is a view showing a steel disk .of the prior invention aforesaid y1n the present arrangement onl desired instead of nsin ada ted for sharpening the inner edge of the knie. Fig. 5 is a side view showing the Steel ol` Fig. 3.

In carrying out my present invention the deviceor apparatus 1s prefera'bl made with a base plate a provided with t iree uprighi pins b, c, and d, the pin b, which is arranged next to the rotary knife e, having the snpport for the Sharpeners, slidably fitted thereon. The pins c and d carry the elevating and retaining mechanism.

The support for the Sharpeners may eonsist of a socket f provided with three arms g, h, t', the arm g having a-forked end Iqil which engages with the pin d. Carried m hall bearin in the two arms I1., i, are thc spindles 7, of the cmery wheels l, 7n.

The s arpeners .and their support are raised and held out of engagement with the knife, by means ol' a spina spring n coiled around the upright pin b an( they are retained in engagement with the knife edge and are ad'usted to the wear thereof by means of tie stop mechanism o which 1s similar to that described in the speciiication except that y one catch 1s re uired. the sha1' )ener support ibeing, there orc, provided wit i only one depending tongue ol and one end only of the holt o2 projects outward beyond the face of the stop mechanism. W iiie being lowered into enga ement with the inner edge of thc knife the lar lening disk m is displaced upon its spindle by means of the ineolnmism p described in the speciication of the seid prior invention.

. The disk 'la which may be o 'fine stone is always used ior grindingr the face of the knifv and 1s pressed against the` fare by the spring u. on the spindle. 'The disk l, which may 'bo a coarse cnwry wheel, is always used for grinding th(` bar-k ol' thc knife and is pressed thcrcagninst by thc spring i1. As the knife rotates thc grinding disks rotate with it. lf n grinding disk 4m l may employ a stool dis t as shown at Fig, il.

ln the arrangement shown at Fig. 3, tinx i soi-kol` o tho sharpcnvr support has two arms g, `r, thc nrm q. having' as before, a bemin" carrying the spindle j of tin` emr-ry stone which is prcssvll against the outercdge ,of the knife by nwans of a spring and the second face substanti arm r has adjustably secured on its upper side a flat bar 1" which is made with slots through which the securing pins 1" iass. The inner end of this bar r is made with a downward projection r", the end of the projection and the Side of' the arm r being cach provided with a )in r between which is fitted a spring r and y means of this s ringr the bar 1" is normally drawn inward. s will be readily seen from Fig. 5, the sprin 1" bears at one end against the fixed part o the pedestal and at the other end against the hook r of the bar r* so as to always pull the sharp ener inward toward the face of the knife. As shown by dotted lines in Figs. 3 and 5, thc screws r workin Slots r in the bar r1. The outer end of this bar is made with a socket 1^ within which the shank s of the ribbed o'r fluted steel Sharpener s1, issecured by means of a pinching screw s, the Sharpener being held against the edge of the knife by the action o the spring 1"".

Havin now full described my invention what I c aim and esire to secure by Letters Patent iszl. A device for Shar ning the rotary circular knives of meat s icing machines, comprising, incombination, a s iarpener for acting upon the' back edge of the knife, a shar ener for acting upon the front edge of t e knife, a support carrying both Shaipeners, said Sharpeners bein operable in ependently of each other an operated by the knife when in en agement therewith, one of said Sharpeners m arranged with its actin y paral el with Vthe face o the knife, means for moving said Sharpeners into and out of engagement with the knife and means for elevating and retaining said Support out of operative position.

2. A device for Shar ening the rotary circular lmives of meat slicing machines, com-4 prising, in combination, a rotary Sharpener Set at an angle for sharpenin the back edge of a knife, a non-rotatable s r ener whose plane is parallel with the face of t e knife and out of parallelism with the rotary Sharpener for Sharpe the front edge of the knife, a support carrying both Sharpeners, and means for elevating and retainingsaid support out of operative position.

3. A device for Shar ening the rotary-cir cular knives of meat s icing machines, comprising, in combination, a rotary Sharpener set atan angle for s barpeni the back edge of a knife, a non-rotatable s ar ener whose plane is parallel With-the face of t e knife and out of parallelism with the rotary Sharpener,

for sharpening the front edge of the knife, a

support carrying bth Sharpeners, means for elevating and retaini said support out of operative position, an means yieldingly retaining said Sha eners in operative position relative] l"to the ife. r

4. A evice for sharpening the rotary circular knives of meat slicing machines coni-- prising, in combination, asupport, a rotary `Sharpener carried by the support, an arm projecting from the support at an angle, a racket on the arm, a second nonrotating Sharpener thereon the acting faces of said Sharpeners being out of parallelism with each other, and means for holding the sharpenei's respectively into contact with thc hack and front edge of the knife.

5. A device for sha ening the rotary circular knives of meat s icing machines coinprising, in combination, a support, a rotary Sharpener carried by the support, an arm projecting from the support at an angle, a

racket on the arm, means for adjusting the bracket on the arm, a second non-rotating Sharpener thereon the acting faces of said Sharpeners being out of parallelism with each other, and means for holding the Sharpeners respectively into contact with the back and front ed e of the knife.

6. A tevic for sha1 ening the rotary circular knives of meat s icing machines, comprising, in combination, a Support, a rotary Sharpener carried by the support, an arm projecting from the support at an angle,.a

attened bracket adjustably secured to the arm, a spring actin on the bracket, a second Shar ener on the racket, and means for holding the Sharpeners respectively into con tact with the back and front edge of the knife 7. A device for Shar ening the rotary circular knives of meat s icing machines comprising, in combination, a support, a rotary Sharpener carried by the support, an arm projecting from the'su port at an angle, a

racket on the arm, a ribbed steel Sharpener thereon, means for adjusting they bracket on the arm and means for holding the steel Sharpener against the edge of the knife.

8. A device for sha ening the rotary circular, knives of meat s icing machines coinprising, in combination, a support, a rotary Sharpenencarried by the support, a spring acting on Said sharpenenan arm projecting from the Support at an an le, a bracket on the arm, a ribbed steel sarpener of oval Shape fitted in the bracket, means for adjusting the bracket longitudinally on the arm and a spring acting on the bracket.

9. A device for sharpening the rotary circular knives of meat s icing machines comprising, in combination, asupport, a spindle therein, a grinding disk mounted on the spindle, a spring bearing against, said disk, an arm rejecting from the Support, aflat bracket aving a socket at its end and ad- 'ustably secured to the arm, a ribbed steel tted in said socket, and held in lace b a Screw, a tail iece at the end of tiie bracliet and a spring ocated between Said tail piece and the support.

'10. A device for Sharpening the rotary circular knives of meat slicingvmachines, co1nf their support out of engagement with th'f, 10 prsing in wmbinatirm, a support, a rotary knife.

sharpnner and a nm--x'utary Sharpener da In testimnny n imm-ed I affix my signature posed aft an angle tfo mclhrther witg thekr i in presence of two witnesses.

acti aces out o )am e ism wit, @acl 1 otheg't, means for huldEng the sha1-)cuers m- "HMMUS "mRMMb VM Bumm spcctively into Contact with thv Jack. and Witnesses:

front edges of the knife, and yielding means FREIJEMKUS A. H. STAM, for raising `and holding said sharpeuers md y .If/muws J. Sunfwmmxnn. 

